Pointless infighting among progressives is becoming exhausting and harmful

Bernie Sanders is making money for charity thanks to his virtual inauguration meme.
Brendan Smialowski/Getty Images
A disagreement over Medicare For All has pit influential progressives against Rep. Alexandria Ocasio-Cortez.
It's the latest example of progressives engaging in dumb, line-drawing battles against each other.
Debate is healthy, but shunning people who want the same things is counter-productive.
This is an opinion column. The thoughts expressed are those of the author.
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